CN104004918B - A kind of copper blast-furnace collocation processes the method for kiln slag - Google Patents
A kind of copper blast-furnace collocation processes the method for kiln slag Download PDFInfo
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Abstract
A kind of copper blast-furnace collocation processes the method for kiln slag, comprises the steps: 1) take kiln slag in right amount, moisture requirement is less than 8%, and granularity requirements is at 4mm～100mm；2) copper material 76.8～86.5%, kiln slag 4.7～12.0%, flux 6.2～6.9%, coke 8.7～9.3% 4 kind of material, melting during layering enters copper blast-furnace in units of charge are taken；3) airtight copper blast-furnace melting；4) kiln slag, copper material, flux obtain containing gold and silver matte, flue dust and Water Quenching Slag after copper blast-furnace melting；After reclaiming containing the valuable element gold, silver in gold and silver matte and copper, containing gold and silver matte directly as the raw material of blowing copper；After reclaiming the valuable element lead in flue dust, flue dust is directly as the raw material of refining lead；Water Quenching Slag is for sale is applied to other industry.Present invention process is simple, and melting low cost, corrosion-free, the fixed carbon utilization rate in kiln slag is up to more than 98%, and the Cu rate of recovery is more than 65%, and the Ag rate of recovery is more than 90%, and the Au rate of recovery is more than 96%.
Description
Technical field
The present invention relates to metal smelt technical field, particularly relate to a kind of method that copper blast-furnace collocation processes kiln slag.
Background technology
Kiln slag is that acid leaching residue allocates the coke powder accounting for its weight 45%～55% into, and in Rotary Kiln, high temperature reduction through 1100～1300 DEG C volatilizees shrend after the metal such as zinc, lead, cadmium, indium.Owing to the kiln slag of output usually contains the valuable metal elements such as higher copper, lead, zinc, gold, silver, it is therefore necessary to kiln slag is processed, with the above-mentioned valuable metal of effective enriching and recovering.Kiln residues processing technique is divided into chemistry smelting process and physical separation method, chemistry to smelt and is divided into again wet method and pyrogenic process.Wet method has hydrochloric acid leaching process, isolation-floatation, bioleaching method etc.；Pyrogenic process has ore dressing-chlorinating roasting, submergence smelting process, chlorination-sulfating roasting method, sintering-Blast Furnace Method, base husband's Saite method etc..Physical separation method has magnetic separation-screening-pneumatic concentration and broken-ball milling-magnetic separation-gravity separation method.
Existing kiln slag processing method mainly uses sintering-Blast Furnace Method, base husband's Saite method, magnetic separation-screening-pneumatic concentration and broken-ball milling-magnetic separation-gravity separation method.
Sintering-Blast Furnace Method is that first in kiln slag, addition lead concentrate or pyrite are sintered, then the lead bullion or the matte that are formed in fusion process with blast furnace trap copper, gold, silver.Its shortcoming is that the discard slag with copper of output is low, need to be enriched with continuously more than twice, and technique is tediously long, and equipment is huge, increases the quantity of slag, causes copper, silver loss；Carbon in kiln slag consumes in sintering, needs again to add the coke of 17% during shaft smelting, and energy consumption is big；Arsenic, sulphur pollution environment in handling process；Dissipated metal does not obtains effective enriching and recovering；Economic effect is undesirable.
Kazakhstan, during base husband's Saite stove directly refines lead, replaces coke with kiln slag, and design coke consumption is 36kg/t furnace charge, and after changing kiln slag into, coke consumption is zero, and the collocation consumption of kiln slag is 2～3.5 ten thousand t.Although kiln slag metal recovery rate and coke utilization rate are the highest, but collocation amount is limited.
Magnetic separation-screening-pneumatic concentration equipment fault is many, and power consumption is big, and dust pollution is serious, and product purpose is limited.
Broken-ball milling-magnetic separation-gravity separation method is difficult to separate valuable metal with iron, even if selecting iron to separate obtain product, all contains a certain amount of valuable metal gold, silver in every kind of product, it is impossible to realize effective enrichment of valuable metal, and relatively low to the utilization ratio of fixed carbon.
Summary of the invention
The technical problem to be solved is, overcome the above-mentioned deficiency of prior art, there is provided a kind of technique simple, melting low cost, corrosion-free, it is easy to the method processing kiln slag with copper blast-furnace collocation of operation, improve gold, silver, the rate of recovery of copper in kiln slag, in cigarette ash, lead is enriched with simultaneously, and high to the utilization ratio of fixed carbon.
The technical solution adopted for the present invention to solve the technical problems is: a kind of copper blast-furnace collocation processes the method for kiln slag, comprises the steps:
1) taking kiln slag appropriate, moisture requirement is less than 8%, and for mass percent, granularity requirements is at 4mm～100mm；
2) take copper material 76.8～86.5%(and be preferably 80 ~ 86%), kiln slag 4.7～12.0%(is preferably 5.0% ~ 11.0%), flux 6.2～6.9%, coke 8.7～9.3% 4 kind of material, it is mass percent, melting during layering enters copper blast-furnace in units of charge；
3) airtight copper blast-furnace melting, the process conditions of copper blast-furnace melting are: focal area temperature is 1200～1300 DEG C (preferably 1220～1280 DEG C), and the blow rate required is 10000～13000m3/ h(is preferably 11000～12000m3/ h), stock column a height of 2.5～2.7m, melting cycle is 100～150min(to be preferably 110～140min)；
4) kiln slag, copper material, flux obtain containing gold and silver matte, flue dust and Water Quenching Slag after copper blast-furnace melting；After reclaiming containing the valuable element gold, silver in gold and silver matte and copper, containing gold and silver matte directly as the raw material of blowing copper；After reclaiming the valuable element lead in flue dust, flue dust is directly as the raw material of refining lead；Water Quenching Slag is for sale is applied to other industry.
Further, in step 1), when the granularity of described kiln slag is more than 100mm, standby after Mechanical Crushing.
Further, step 2) in, described during in units of charge, layering enters copper blast-furnace melting be to be layered by the order of coke kiln slag copper material flux to enter melting in copper blast-furnace in units of charge.
Further, step 2) in, described flux is lime stone.
Further, in step 4), copper metallurgy principle process is used to reclaim gold, silver and copper containing gold and silver matte；Flue dust uses the mode of bag collection to reclaim the valuable elements such as the lead in flue dust；Water Quenching Slag contains iron, silicon and calcium constituent, directly as the raw material of other industry (as produced cement).
The present invention compared with prior art has the advantages that
(1) technique is simple, it is easy to operation.Only just can obtain head product matte, Water Quenching Slag and flue dust by dispensing and melting operation simultaneously, reduce melting cost, it is achieved that efficiently separating and zero-emission of valuable metal；
(2) to kiln slag strong adaptability.Due to low to kiln slag granularity, moisture requirement, powder can be processed, it is also possible to process block, and allow kiln slag composition to have certain fluctuation；
(3) Water Quenching Slag copper content is low.Owing to melt overheat degree is high, copper matte regulus and Water Quenching Slag can efficiently separate；
(4) the fixed carbon utilization rate of kiln slag is high.The utilization rate of fixed carbon is up to more than 98%.
(5) recovery rate of valuable metals in kiln slag is high.The Cu rate of recovery is more than 65%, and the Ag rate of recovery is more than 90%, and the Au rate of recovery is more than 96%.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but technical scheme is not limited to described scope.
Embodiment 1
The method processing kiln slag with copper blast-furnace collocation that the present embodiment provides, comprises the steps:
1) (key component and mass percent are Cu 1.20%, Au 1.80 g/t, Ag to take kiln slag
260 g/t, Pb 0.38%, Zn 1.93%, Fe
19.10%, SiO2 25.00%, CaO 8.00%, C 12.00%, MgO 1.30%, Al2O3
3.60%, other is 27.46% years old) 280kg/ criticizes to make standby, and moisture is less than 8%, for mass percent；It is 80mm ~ 100mm by the granularity that is crushed to more than 100mm of the granularity in kiln slag, subsequently into burden process section；
2) taking copper material 84.0%, kiln slag 9.2%, 6.8% 3 kind of material of lime stone are a collection of, take coke 9.0%, in units of every batch of material, are mass percent, are layered by the order of coke kiln slag copper material lime stone and enter melting in copper blast-furnace；
3) airtight copper blast-furnace melting, the process conditions of copper blast-furnace melting are: focal area temperature is 1250 DEG C, and the blow rate required is 11000m3/ h, a height of 2.7m of stock column, melting cycle is 150min；
4) kiln slag, copper material, flux obtain containing gold and silver matte, flue dust and Water Quenching Slag after copper blast-furnace melting；After using conventional copper metallurgy principle process to reclaim containing the valuable element gold, silver in gold and silver matte and copper, containing gold and silver matte directly as the raw material of blowing copper；After the mode using bag collection reclaims the valuable element lead in flue dust, flue dust is directly as the raw material of refining lead；Water Quenching Slag contains iron, silicon and calcium constituent, for sale is applied to other industry.
Wherein, chemical composition and mass percent containing gold and silver matte are: Cu 31.31%, Fe 25.79%, S 20.43%, Au 4.2g/t, Ag 992.0g/t, Pb 7.62%, Zn 2.12%；The chemical composition of flue dust and mass percent be: Cu 0.30%, S 5.14%, Ag 80g/t, Pb 35.16%, Zn 2.04%, SiO21.36%、CaO 0.30%；The chemical composition of Water Quenching Slag and mass percent are Cu 0.31%, Fe 27.50%, Ag 22g/t, Pb 0.68%, Zn 2.15%, SiO2 33.21%、CaO 11.80%。
In the present embodiment, the rate of recovery of Cu is 74.17%, and the rate of recovery of Ag is 91.53%, and the rate of recovery of Au is 98%, and the utilization rate of fixed carbon is 98.54%.
Embodiment 2
The method processing kiln slag with copper blast-furnace collocation that the present embodiment provides, comprises the steps:
1) (key component and mass percent are Cu 1.20%, Au 1.80 g/t, Ag to take kiln slag
260 g/t, Pb 0.38%, Zn 1.93%, Fe
19.10%, SiO2 25.00%, CaO 8.00%, C 12.00%, MgO 1.30%, Al2O3
3.60%, other is 27.46% years old) 300kg/ criticizes to make standby, and moisture is less than 8%, for mass percent；It is 50mm ~ 80mm by the granularity that is crushed to more than 80mm of the granularity in kiln slag, subsequently into burden process section；
2) taking copper material 86.0%, kiln slag 7.8%, 6.2% 3 kind of material of lime stone are a collection of, take coke 8.9%, in units of every batch of material, are mass percent, are layered by the order of coke kiln slag copper material lime stone and enter melting in copper blast-furnace；
3) airtight copper blast-furnace melting, the process conditions of copper blast-furnace melting are: focal area temperature is 1300 DEG C, and the blow rate required is 13000m3/ h, a height of 2.5m of stock column, melting cycle is 100min；
4) kiln slag, copper material, flux obtain containing gold and silver matte, flue dust and Water Quenching Slag after copper blast-furnace melting；After using conventional copper metallurgy principle process to reclaim containing the valuable element gold, silver in gold and silver matte and copper, containing gold and silver matte directly as the raw material of blowing copper；After the mode using bag collection reclaims the valuable element lead in flue dust, flue dust is directly as the raw material of refining lead；Water Quenching Slag contains iron, silicon and calcium constituent, for sale is applied to other industry.
Wherein, chemical composition and mass percent containing gold and silver matte are: Cu 30.24%, Fe 27.52%, S 19.43%, Au 4.1g/t, Ag 982.0g/t, Pb 6.62%, Zn 1.82%；The chemical composition of flue dust and mass percent be: Cu 0.33%, S 5.34%, Ag 84g/t, Pb 36.78%, Zn 2.14%, SiO21.26%、CaO 0.31%；The chemical composition of Water Quenching Slag and mass percent are Cu 0.29%, Fe 26.80%, Ag 25g/t, Pb 0.72%, Zn 2.05%, SiO2 34.56%、CaO 10.58%。
In the present embodiment, the rate of recovery of Cu is 75.83%, and the rate of recovery of Ag is 90.38%, and the rate of recovery of Au is 96%, and the utilization rate of fixed carbon is 98.43%.
Embodiment 3
The method processing kiln slag with copper blast-furnace collocation that the present embodiment provides, comprises the steps:
1) (key component and mass percent are Cu 1.20%, Au 1.80 g/t, Ag to take kiln slag
260 g/t, Pb 0.38%, Zn 1.93%, Fe
19.10%, SiO2 25.00%, CaO 8.00%, C 12.00%, MgO 1.30%, Al2O3
3.60%, other is 27.46% years old) 200kg/ criticizes to make standby, and moisture is less than 8%, for mass percent；It is 20mm ~ 50mm by the granularity that is crushed to more than 50mm of the granularity in kiln slag, subsequently into burden process section；
2) taking copper material 80.0%, kiln slag 12.0%, 6.9% 3 kind of material of lime stone are a collection of, take coke 9.3%, in units of every batch of material, are mass percent, are layered by the order of coke kiln slag copper material lime stone and enter melting in copper blast-furnace；
3) airtight copper blast-furnace melting, the process conditions of copper blast-furnace melting are: focal area temperature is 1200 DEG C, and the blow rate required is 12000m3/ h, a height of 2.6m of stock column, melting cycle is 140min；
4) kiln slag, copper material, flux obtain containing gold and silver matte, flue dust and Water Quenching Slag after copper blast-furnace melting；After using conventional copper metallurgy principle process to reclaim containing the valuable element gold, silver in gold and silver matte and copper, containing gold and silver matte directly as the raw material of blowing copper；After the mode using bag collection reclaims the valuable element lead in flue dust, flue dust is directly as the raw material of refining lead；Water Quenching Slag contains iron, silicon and calcium constituent, for sale is applied to other industry.
Wherein, chemical composition and mass percent containing gold and silver matte are: Cu 31.02%, Fe 25.56%, S 20.14%, Au 4.0g/t, Ag 988.0g/t, Pb 6.62%, Zn 1.56%；The chemical composition of flue dust and mass percent be: Cu 0.30%, S 5.02%, Ag 78g/t, Pb 34.22%, Zn 1.46%, SiO21.14%、CaO 0.26%；The chemical composition of Water Quenching Slag and mass percent are Cu 0.33%, Fe 27.50%, Ag 26g/t, Pb 0.70%, Zn 2.18%, SiO2 33.64%、CaO 11.40%。
In the present embodiment, the rate of recovery of Cu is 72.5%, and the rate of recovery of Ag is 90.00%, and the rate of recovery of Au is 97%, and the utilization rate of fixed carbon is 98.84%.
Claims (8)
1. the method processing kiln slag with copper blast-furnace collocation, it is characterised in that comprise the steps:
1) taking kiln slag appropriate, moisture requirement is less than 8%, and for mass percent, granularity requirements is at 4mm～100mm；
2) copper material 76.8～80%, kiln slag 4.7～7.8%, flux are taken
6.2～6.9%, coke 8.7～9.3% 4 kind of material, it is mass percent, melting during layering enters copper blast-furnace in units of charge；
3) airtight copper blast-furnace melting, the process conditions of copper blast-furnace melting are: focal area temperature is 1200～1300 DEG C, and the blow rate required is 10000～13000m3/ h, stock column a height of 2.5～2.7m, melting cycle is 100～150min；
4) kiln slag, copper material, flux obtain containing gold and silver matte, flue dust and Water Quenching Slag after copper blast-furnace melting；After reclaiming containing the valuable element gold, silver in gold and silver matte and copper, containing gold and silver matte directly as the raw material of blowing copper；After reclaiming the valuable element lead in flue dust, flue dust is directly as the raw material of refining lead；Water Quenching Slag is for sale is applied to other industry.
2. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 1, it is characterised in that in step 1), when the granularity of described kiln slag is more than 100mm, standby after Mechanical Crushing.
3. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 1 or 2, it is characterized in that, step 2) in, it is described that in units of charge, layering enters melting in copper blast-furnace is to be layered by the order of coke kiln slag copper material flux to enter melting in copper blast-furnace in units of charge.
4. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 1 or 2, it is characterised in that step 2) in, described flux is lime stone.
5. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 3, it is characterised in that step 2) in, described flux is lime stone.
6. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 1 or 2, it is characterised in that in step 3), the focal area temperature of described copper blast-furnace melting is 1220～1280 DEG C.
7. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 5, it is characterised in that in step 3), the focal area temperature of described copper blast-furnace melting is 1220～1280 DEG C.
8. the method processing kiln slag with copper blast-furnace collocation as claimed in claim 1 or 2, it is characterised in that in step 4), the valuable element lead in described flue dust uses the mode of bag collection to reclaim.
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| CN103468954A (en) * | 2013-08-16 | 2013-12-25 | 云南云铜锌业股份有限公司 | Method for recycling valuable metals by smelting zinc kiln slag, leaching slag and lead slag |
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| CN103468954A (en) * | 2013-08-16 | 2013-12-25 | 云南云铜锌业股份有限公司 | Method for recycling valuable metals by smelting zinc kiln slag, leaching slag and lead slag |
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| 锌窑渣产业化中铜的回收和走向的分析;李永祥等;《全国"十二五铅锌冶金技术发展论坛暨驰宏公司六十周年大庆学术交流会论文集"》;20101231;247-253 * |
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